Blue/red stone upgradeable?

I recall seeing a korean screenshot with the devil slayer with a one handed red upgrade. To add to that, I know for a fact some upcoming Knuckles (Merlin Shyllien Magic Knuckles for example) have one handed red upgrades but two handed blue upgrades. (That was confirmed to not be a glitch.) That picture proves Barbaric Fox Scythe has two handed blue special upgrades. Can we not jump to conclusions and confirm if:

• Barbaric has two handed red special upgrades.
• Devil Slayer has two handed blue special upgrades.
• Devil Slayer has two handed red special upgrades.

With actual photo proof.